Macworld If your Mac is beginning to sound like it has a jet engine spinning up inside it’s not just annoying, it may also be a sign that something is wrong. There could be an issue that is causing your Mac to overheat, or you might have a faulty fan. Here’s what to do if those fans keep whirring even if nothing appears to be wrong. Why is my Mac’s fan so loud all of a sudden?Having the fans going at full pelt isn’t a sign that things are necessarily wrong with your Mac, as the reason they’re installed in the first place is to cool down the insides of your computer by increasing the airflow ar…